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d Z e a d Z d Z d Z e a d a e e i d d d Z d d d Z d d d Z d Z d! Z d f d" YZ d f d# YZ d e i f d$ YZ d e f d% YZ d
e f d& YZ d e f d' YZ! e i d( Z" e e e e d) Z# e i d* Z$ d+ Z% d, Z& d- Z' d. Z( e d/ Z) d0 d1 Z* e+ d2 j o e" n d S(3 s Support module for CGI (Common Gateway Interface) scripts.
This module defines a number of utilities for use by CGI scripts
written in Python.
s 2.6i˙˙˙˙( t
attrgetterN( t StringIOt MiniFieldStoraget FieldStoraget FormContentDictt SvFormContentDictt InterpFormContentDictt FormContentt parset parse_qst parse_qslt parse_multipartt parse_headert print_exceptiont
print_environt
print_formt print_directoryt print_argumentst print_environ_usaget escapet c G sa t o5 t o- y t t d a Wq< t j
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t a n t a t | d S( s Write a log message, if there is a log file.
Even though this function is called initlog(), you should always
use log(); log is a variable that is set either to initlog
(initially), to dolog (once the log file has been opened), or to
nolog (when logging is disabled).
The first argument is a format string; the remaining arguments (if
any) are arguments to the % operator, so e.g.
log("%s: %s", "a", "b")
will write "a: b" to the log file, followed by a newline.
If the global logfp is not None, it should be a file object to
which log data is written.
If the global logfp is None, the global logfile may be a string
giving a filename to open, in append mode. This file should be
world writable!!! If the file can't be opened, logging is
silently disabled (since there is no safe place where we could
send an error message).
t aN( t logfilet logfpt opent IOErrort nologt logt dolog( t allargs( ( s /usr/local/lib/python2.5/cgi.pyt initlog> s
c G s t i | | d d S( s= Write a log message to the log file. See initlog() for docs.s
N( R t write( t fmtt args( ( s /usr/local/lib/python2.5/cgi.pyR a s c G s d S( s9 Dummy function, assigned to log when logging is disabled.N( ( R ( ( s /usr/local/lib/python2.5/cgi.pyR e s i c C sĽ | d
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| | | S( s Parse a query in the environment or from a file (default stdin)
Arguments, all optional:
fp : file pointer; default: sys.stdin
environ : environment dictionary; default: os.environ
keep_blank_values: flag indicating whether blank values in
URL encoded forms should be treated as blank strings.
A true value indicates that blanks should be retained as
blank strings. The default false value indicates that
blank values are to be ignored and treated as if they were
not included.
strict_parsing: flag indicating what to do with parsing errors.
If false (the default), errors are silently ignored.
If true, errors raise a ValueError exception.
t REQUEST_METHODt GETt POSTt CONTENT_TYPEs multipart/form-datas! application/x-www-form-urlencodedt CONTENT_LENGTHs Maximum content length exceededR t QUERY_STRINGt &i N( t Nonet syst stdinR R t intt maxlent
ValueErrort readt argvR ( t fpt environt keep_blank_valuest strict_parsingt ctypet pdictt clengtht qs( ( s /usr/local/lib/python2.5/cgi.pyR s s<
c C s\ h } xO t | | | D]; \ } } | | j o | | i | q | g | | <q W| S( sŞ Parse a query given as a string argument.
Arguments:
qs: URL-encoded query string to be parsed
keep_blank_values: flag indicating whether blank values in
URL encoded queries should be treated as blank strings.
A true value indicates that blanks should be retained as
blank strings. The default false value indicates that
blank values are to be ignored and treated as if they were
not included.
strict_parsing: flag indicating what to do with parsing errors.
If false (the default), errors are silently ignored.
If true, errors raise a ValueError exception.
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t append( R8 R3 R4 t dictt namet value( ( s /usr/local/lib/python2.5/cgi.pyR ¨ s
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| f qM qM W| S( s Parse a query given as a string argument.
Arguments:
qs: URL-encoded query string to be parsed
keep_blank_values: flag indicating whether blank values in
URL encoded queries should be treated as blank strings. A
true value indicates that blanks should be retained as blank
strings. The default false value indicates that blank values
are to be ignored and treated as if they were not included.
strict_parsing: flag indicating what to do with parsing errors. If
false (the default), errors are silently ignored. If true,
errors raise a ValueError exception.
Returns a list, as G-d intended.
R( t ;t =i i s bad query field: %rR i t +t ( t splitt lenR. R9 t urllibt unquotet replace( R8 R3 R4 t _[1]t s1t s2t pairst rt
name_valuet nvR; R< ( ( s /usr/local/lib/python2.5/cgi.pyR
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d j o qi n d | j o | d } n qi | | j o | | i | qi | g | | <qi W| S( sř Parse multipart input.
Arguments:
fp : input file
pdict: dictionary containing other parameters of content-type header
Returns a dictionary just like parse_qs(): keys are the field names, each
value is a list of values for that field. This is easy to use but not
much good if you are expecting megabytes to be uploaded -- in that case,
use the FieldStorage class instead which is much more flexible. Note
that content-type is the raw, unparsed contents of the content-type
header.
XXX This does not parse nested multipart parts -- use FieldStorage for
that.
XXX This should really be subsumed by FieldStorage altogether -- no
point in having two implementations of the same parsing algorithm.
Also, FieldStorage protects itself better against certain DoS attacks
by limiting the size of the data read in one chunk. The API here
does not support that kind of protection. This also affects parse()
since it can call parse_multipart().
R t boundarys& Invalid boundary in multipart form: %rs --i˙˙˙˙s content-lengthi s Maximum content length exceededi iţ˙˙˙s
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s content-dispositions form-dataR; N( t valid_boundaryR. R) t mimetoolst Messaget getheaderR, R- R/ t readlinet stripR9 t joinR ( R1 R6 RM t nextpartt lastpartt partdictt
terminatort bytest datat headersR7 t linest linet keyt paramsR; ( ( s /usr/local/lib/python2.5/cgi.pyR ë s|
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C s" g } | i d D] } | | i q ~ } | i d i } h } xĘ | D]Â } | i d } | d j o | | i i } | | d i } t | d j oU | d | d j o
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d } n | | | <qR qR W| | f S( sf Parse a Content-type like header.
Return the main content-type and a dictionary of options.
R= i R> i i i˙˙˙˙t "s \\s \s \"( RA RS t popt lowert findRB RE (
R] RF t xt plistR^ R6 t pt iR; R< ( ( s /usr/local/lib/python2.5/cgi.pyR M s 0
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RS( s= Like FieldStorage, for use when no file uploads are possible.c C s | | _ | | _ d S( s& Constructor from field name and value.N( R; R< ( t selfR; R< ( ( s /usr/local/lib/python2.5/cgi.pyt __init__s s c C s d | i | i f S( s Return printable representation.s MiniFieldStorage(%r, %r)( R; R< ( Rh ( ( s /usr/local/lib/python2.5/cgi.pyt __repr__y s N( t __name__t
__module__t __doc__R) t filenamet listt typet filet type_optionst dispositiont disposition_optionsR[ Ri Rj ( ( ( s /usr/local/lib/python2.5/cgi.pyR e s c B sţ e Z d Z d d d e i d d d Z d Z d Z d Z d Z
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Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d d Z RS( s Store a sequence of fields, reading multipart/form-data.
This class provides naming, typing, files stored on disk, and
more. At the top level, it is accessible like a dictionary, whose
keys are the field names. (Note: None can occur as a field name.)
The items are either a Python list (if there's multiple values) or
another FieldStorage or MiniFieldStorage object. If it's a single
object, it has the following attributes:
name: the field name, if specified; otherwise None
filename: the filename, if specified; otherwise None; this is the
client side filename, *not* the file name on which it is
stored (that's a temporary file you don't deal with)
value: the value as a *string*; for file uploads, this
transparently reads the file every time you request the value
file: the file(-like) object from which you can read the data;
None if the data is stored a simple string
type: the content-type, or None if not specified
type_options: dictionary of options specified on the content-type
line
disposition: content-disposition, or None if not specified
disposition_options: dictionary of corresponding options
headers: a dictionary(-like) object (sometimes rfc822.Message or a
subclass thereof) containing *all* headers
The class is subclassable, mostly for the purpose of overriding
the make_file() method, which is called internally to come up with
a file open for reading and writing. This makes it possible to
override the default choice of storing all files in a temporary
directory and unlinking them as soon as they have been opened.
R i c
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| d j op d | j o | d } n& t i d o t i d } n d } t | } | d j o h d d <} qĂ n | d j oc h } | d j o d | d <n d
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t d qőn | | _ d | _ | _ d | _ | d j o | i n3 | d d j o | i | | | n | i d S( s Constructor. Read multipart/* until last part.
Arguments, all optional:
fp : file pointer; default: sys.stdin
(not used when the request method is GET)
headers : header dictionary-like object; default:
taken from environ as per CGI spec
outerboundary : terminating multipart boundary
(for internal use only)
environ : environment dictionary; default: os.environ
keep_blank_values: flag indicating whether blank values in
URL encoded forms should be treated as blank strings.
A true value indicates that blanks should be retained as
blank strings. The default false value indicates that
blank values are to be ignored and treated as if they were
not included.
strict_parsing: flag indicating what to do with parsing errors.
If false (the default), errors are silently ignored.
If true, errors raise a ValueError exception.
R# R" t HEADR' i R s! application/x-www-form-urlencodeds content-typeR$ R% R& s content-lengths content-dispositionR; Rn s
text/plainRM i˙˙˙˙s Maximum content length exceededi i
s
multipart/N( R3 R4 t upperR* R0 R R) R+ R1 R[ t
outerboundaryR Rs Rt R; Rn Rp Rr t
innerboundaryR, R. R- t lengthRo Rq t donet read_urlencodedt
read_multit read_single(
Rh R1 R[ Rw R2 R3 R4 t methodR8 t cdispR6 R5 t clen( ( s /usr/local/lib/python2.5/cgi.pyRi Š s~
c C s d | i | i | i f S( s" Return a printable representation.s FieldStorage(%r, %r, %r)( R; Rn R< ( Rh ( ( s /usr/local/lib/python2.5/cgi.pyRj s c C s t | i S( N( t itert keys( Rh ( ( s /usr/local/lib/python2.5/cgi.pyt __iter__ s c C s~ | d j o
t | n | i o3 | i i d | i i } | i i d n$ | i d j o
| i } n d } | S( NR< i ( t AttributeErrorRq t seekR/ Ro R) ( Rh R; R< ( ( s /usr/local/lib/python2.5/cgi.pyt __getattr__" s
c C s | i d j o
t d n g } x2 | i D]' } | i | j o | i | q- q- W| p
t | n t | d j o | d Sn | Sd S( s Dictionary style indexing.s
not indexablei i N( Ro R) t TypeErrorR; R9 t KeyErrorRB ( Rh R^ t foundt item( ( s /usr/local/lib/python2.5/cgi.pyt __getitem__/ s
c C sZ | | j oE | | } t | t g j o t t d | SqV | i Sn | Sd S( s8 Dictionary style get() method, including 'value' lookup.R< N( Rp t mapR R< ( Rh R^ t defaultR< ( ( s /usr/local/lib/python2.5/cgi.pyt getvalue= s
c C sR | | j o= | | } t | t g j o | d i SqN | i Sn | Sd S( s! Return the first value received.i N( Rp R< ( Rh R^ R R< ( ( s /usr/local/lib/python2.5/cgi.pyt getfirstH s
c C s] | | j oH | | } t | t g j o t t d | SqY | i g Sn g Sd S( s Return list of received values.R< N( Rp R R R< ( Rh R^ R< ( ( s /usr/local/lib/python2.5/cgi.pyt getlistS s
c C s_ | i d j o
t d n g } x5 | i D]* } | i | j o | i | i q- q- W| S( s Dictionary style keys() method.s
not indexableN( Ro R) R R; R9 ( Rh R R ( ( s /usr/local/lib/python2.5/cgi.pyR ^ s
c C sM | i d j o
t d n x) | i D] } | i | j o t Sq' q' Wt S( s" Dictionary style has_key() method.s
not indexableN( Ro R) R R; t Truet False( Rh R^ R ( ( s /usr/local/lib/python2.5/cgi.pyt has_keyg s
c C sM | i d j o
t d n x) | i D] } | i | j o t Sq' q' Wt S( s% Dictionary style __contains__ method.s
not indexableN( Ro R) R R; R R ( Rh R^ R ( ( s /usr/local/lib/python2.5/cgi.pyt __contains__o s
c C s t | i S( s Dictionary style len(x) support.( RB R ( Rh ( ( s /usr/local/lib/python2.5/cgi.pyt __len__w s c C so | i i | i } g | _ } x< t | | i | i D]" \ } } | i t | | q; W| i d S( s+ Internal: read data in query string format.N(
R1 R/ Ry Ro R
R3 R4 R9 R t
skip_lines( Rh R8 Ro R^ R< ( ( s /usr/local/lib/python2.5/cgi.pyR{ { s
c C sÄ | i } t | p t d | f n g | _ | i p | i } | | i h | | | | } xO | i pD t i | i } | | i | | | | | } | i i
| qg W| i d S( s/ Internal: read a part that is itself multipart.s& Invalid boundary in multipart form: %rN( Rx RN R. Ro t FieldStorageClasst __class__R1 Rz t rfc822RP R9 R ( Rh R2 R3 R4 t ibt klasst partR[ ( ( s /usr/local/lib/python2.5/cgi.pyR| s
c C sF | i d j o | i | i n | i | i i d d S( s Internal: read an atomic part.i N( Ry t read_binaryR t
read_linesRq R
( Rh ( ( s /usr/local/lib/python2.5/cgi.pyR} s
i i c C s | i d | _ | i } | d j ol xi | d j oW | i i t | | i } | p d | _ Pn | i i | | t | } q+ Wn d S( s Internal: read binary data.t bi i˙˙˙˙N(
t make_fileRq Ry R1 R/ t mint bufsizeRz R RB ( Rh t todoRZ ( ( s /usr/local/lib/python2.5/cgi.pyR ˘ s
c C s9 t | _ | _ | i o | i n | i d S( s0 Internal: read lines until EOF or outerboundary.N( R Rq t _FieldStorage__fileRw t read_lines_to_outerboundaryt read_lines_to_eof( Rh ( ( s /usr/local/lib/python2.5/cgi.pyR Ż s
c C s | i d j o\ | i i t | d j o8 | i d | _ | i i | i i d | _ ql n | i i | d S( Nič R ( R¤ R) t tellRB R Rq R R ( Rh R] ( ( s /usr/local/lib/python2.5/cgi.pyt __writeˇ s c C s> x7 | i i d } | p d | _ Pn | i | q d S( s Internal: read lines until EOF.i i i˙˙˙˙Ni ( R1 RR Rz t _FieldStorage__write( Rh R] ( ( s /usr/local/lib/python2.5/cgi.pyRŚ ż s c C s" d | i } | d } d } t } xř | i i d } | p d | _ Pn | d d j oD | o= | i } | | j o Pn | | j o d | _ Pq˘ n | } | d d j o d } | d } t } n8 | d d j o d } | d } t } n
d } t } | i | | q& d
S( s) Internal: read lines until outerboundary.s --R i i i˙˙˙˙i iţ˙˙˙s
s
Ni ( Rw R R1 RR Rz RS R RŠ ( Rh t nextt lastt delimt last_line_lfendR] t strippedlinet odelim( ( s /usr/local/lib/python2.5/cgi.pyRĽ Č s8
c C sĎ | i p
| i o d Sn d | i } | d } t } x | i i d } | p d | _ Pn | d d j oD | o= | i } | | j o Pn | | j o d | _ Pqš n | i d } q= d S( s5 Internal: skip lines until outer boundary if defined.Ns --i i i˙˙˙˙i s
i ( Rw Rz R R1 RR RS t endswith( Rh RŞ RŤ R R] RŽ ( ( s /usr/local/lib/python2.5/cgi.pyR č s$
c C s d d k } | i d S( są Overridable: return a readable & writable file.
The file will be used as follows:
- data is written to it
- seek(0)
- data is read from it
The 'binary' argument is unused -- the file is always opened
in binary mode.
This version opens a temporary file for reading and writing,
and immediately deletes (unlinks) it. The trick (on Unix!) is
that the file can still be used, but it can't be opened by
another process, and it will automatically be deleted when it
is closed or when the current process terminates.
If you want a more permanent file, you derive a class which
overrides this method. If you want a visible temporary file
that is nevertheless automatically deleted when the script
terminates, try defining a __del__ method in a derived class
which unlinks the temporary files you have created.
i˙˙˙˙Ns w+b( t tempfilet
TemporaryFile( Rh t binaryRą ( ( s /usr/local/lib/python2.5/cgi.pyR ý s Ni ( Rk Rl Rm R) t osR2 Ri Rj R R R R R R R R R R R{ R R| R} R˘ R R RŠ RŚ RĽ R R ( ( ( s /usr/local/lib/python2.5/cgi.pyR ~ s4 ) p
c B s e Z d Z e i d Z RS( sx Form content as dictionary with a list of values per field.
form = FormContentDict()
form[key] -> [value, value, ...]
key in form -> Boolean
form.keys() -> [key, key, ...]
form.values() -> [[val, val, ...], [val, val, ...], ...]
form.items() -> [(key, [val, val, ...]), (key, [val, val, ...]), ...]
form.dict == {key: [val, val, ...], ...}
c C s* t d | | _ | _ | d | _ d S( NR2 R' ( R R: RZ t query_string( Rh R2 ( ( s /usr/local/lib/python2.5/cgi.pyRi * s ( Rk Rl Rm R´ R2 Ri ( ( ( s /usr/local/lib/python2.5/cgi.pyR s c B s2 e Z d Z d Z d Z d Z d Z RS( s÷ Form content as dictionary expecting a single value per field.
If you only expect a single value for each field, then form[key]
will return that single value. It will raise an IndexError if
that expectation is not true. If you expect a field to have
possible multiple values, than you can use form.getlist(key) to
get all of the values. values() and items() are a compromise:
they return single strings where there is a single value, and
lists of strings otherwise.
c C s6 t | i | d j o
t d n | i | d S( Ni s expecting a single valuei ( RB R: t
IndexError( Rh R^ ( ( s /usr/local/lib/python2.5/cgi.pyR ; s
c C s | i | S( N( R: ( Rh R^ ( ( s /usr/local/lib/python2.5/cgi.pyR ? s c C sY g } xL | i i D]; } t | d j o | i | d q | i | q W| S( Ni i ( R: t valuesRB R9 ( Rh t resultR< ( ( s /usr/local/lib/python2.5/cgi.pyRˇ A s c C sk g } x^ | i i D]M \ } } t | d j o | i | | d f q | i | | f q W| S( Ni i ( R: t itemsRB R9 ( Rh R¸ R^ R< ( ( s /usr/local/lib/python2.5/cgi.pyRš H s ( Rk Rl Rm R R Rˇ Rš ( ( ( s /usr/local/lib/python2.5/cgi.pyR / s
c B s) e Z d Z d Z d Z d Z RS( s7 This class is present for backwards compatibility only.c C sy t i | | } | d d j oL y t | SWqo t j
o+ y t | SWqk t j
o qk Xqo Xn | i S( Ni s
0123456789+-.( R R R, R. t floatRS ( Rh R^ t v( ( s /usr/local/lib/python2.5/cgi.pyR S s c C s` g } xS | i D]E } y | i | | Wq t j
o | i | i | q Xq W| S( N( R R9 Rś R: ( Rh R¸ R^ ( ( s /usr/local/lib/python2.5/cgi.pyRˇ [ s
c C sl g } x_ | i D]Q } y | i | | | f Wq t j
o! | i | | i | f q Xq W| S( N( R R9 Rś R: ( Rh R¸ R^ ( ( s /usr/local/lib/python2.5/cgi.pyRš c s
#( Rk Rl Rm R Rˇ Rš ( ( ( s /usr/local/lib/python2.5/cgi.pyR Q s c B sD e Z d Z d Z d Z d Z d Z d Z d Z RS( s7 This class is present for backwards compatibility only.c C s' | | i j o | i | Sn d Sd S( N( R: R) ( Rh R^ ( ( s /usr/local/lib/python2.5/cgi.pyRˇ o s c C sM | | i j o5 t | i | | j o | i | | SqI d Sn d Sd S( N( R: RB R) ( Rh R^ t location( ( s /usr/local/lib/python2.5/cgi.pyt
indexed_valuer s
c C s+ | | i j o | i | d Sn d Sd S( Ni ( R: R) ( Rh R^ ( ( s /usr/local/lib/python2.5/cgi.pyR< x s c C s t | i | S( N( RB R: ( Rh R^ ( ( s /usr/local/lib/python2.5/cgi.pyRy { s c C s1 | | i j o | i | d i Sn d Sd S( Ni ( R: RS R) ( Rh R^ ( ( s /usr/local/lib/python2.5/cgi.pyt stripped} s c C s | i S( N( R: ( Rh ( ( s /usr/local/lib/python2.5/cgi.pyt pars s ( Rk Rl Rm Rˇ R˝ R< Ry Rž Rż ( ( ( s /usr/local/lib/python2.5/cgi.pyR m s c C sÉ d GHHt i t _ yW t } t t t | t | t d } | d } d GH| Wn t n Xd GHd a
y/ t } t t t | t | Wn t n Xd S( s Robust test CGI script, usable as main program.
Write minimal HTTP headers and dump all information provided to
the script in HTML form.
s Content-type: text/htmlc R s d d Ud S( Ns, testing print_exception() -- <I>italics?</I>( ( ( ( s /usr/local/lib/python2.5/cgi.pyt f s c S s | d S( N( ( RŔ ( ( s /usr/local/lib/python2.5/cgi.pyt g s s9 <H3>What follows is a test, not an actual exception:</H3>s* <H1>Second try with a small maxlen...</H1>i2 N( R* t stdoutt stderrR R R R R R R
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c C s | d j o t i \ } } } n d d k } Hd GH| i | | | i | | } d t d i | d t | d f GH~ d S( Ni˙˙˙˙s+ <H3>Traceback (most recent call last):</H3>s <PRE>%s<B>%s</B></PRE>R ( R) R* t exc_infot tracebackt format_tbt format_exception_onlyR RT ( Rp R< t tbt limitRÇ Ro ( ( s /usr/local/lib/python2.5/cgi.pyR
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c C s] | i } | i Hd GHd GHx/ | D]' } d Gt | Gd Gt | | GHq( Wd GHHd S( s# Dump the shell environment as HTML.s <H3>Shell Environment:</H3>s <DL>s <DT>s <DD>s </DL>N( R t sortR ( R2 R R^ ( ( s /usr/local/lib/python2.5/cgi.pyR ź s
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c C s d GHd S( s9 Dump a list of environment variables used by CGI as HTML.sŘ
<H3>These environment variables could have been set:</H3>
<UL>
<LI>AUTH_TYPE
<LI>CONTENT_LENGTH
<LI>CONTENT_TYPE
<LI>DATE_GMT
<LI>DATE_LOCAL
<LI>DOCUMENT_NAME
<LI>DOCUMENT_ROOT
<LI>DOCUMENT_URI
<LI>GATEWAY_INTERFACE
<LI>LAST_MODIFIED
<LI>PATH
<LI>PATH_INFO
<LI>PATH_TRANSLATED
<LI>QUERY_STRING
<LI>REMOTE_ADDR
<LI>REMOTE_HOST
<LI>REMOTE_IDENT
<LI>REMOTE_USER
<LI>REQUEST_METHOD
<LI>SCRIPT_NAME
<LI>SERVER_NAME
<LI>SERVER_PORT
<LI>SERVER_PROTOCOL
<LI>SERVER_ROOT
<LI>SERVER_SOFTWARE
</UL>
In addition, HTTP headers sent by the server may be passed in the
environment as well. Here are some common variable names:
<UL>
<LI>HTTP_ACCEPT
<LI>HTTP_CONNECTION
<LI>HTTP_HOST
<LI>HTTP_PRAGMA
<LI>HTTP_REFERER
<LI>HTTP_USER_AGENT
</UL>
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